1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 4 * Author:Mark Yao <mark.yao@rock-chips.com> 5 */ 6 7 #include <linux/kernel.h> 8 9 #include <drm/drm.h> 10 #include <drm/drm_atomic.h> 11 #include <drm/drm_damage_helper.h> 12 #include <drm/drm_fb_helper.h> 13 #include <drm/drm_fourcc.h> 14 #include <drm/drm_gem_framebuffer_helper.h> 15 #include <drm/drm_probe_helper.h> 16 17 #include "rockchip_drm_drv.h" 18 #include "rockchip_drm_fb.h" 19 #include "rockchip_drm_gem.h" 20 #include "rockchip_drm_psr.h" 21 22 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { 23 .destroy = drm_gem_fb_destroy, 24 .create_handle = drm_gem_fb_create_handle, 25 .dirty = drm_atomic_helper_dirtyfb, 26 }; 27 28 static struct drm_framebuffer * 29 rockchip_fb_alloc(struct drm_device *dev, const struct drm_mode_fb_cmd2 *mode_cmd, 30 struct drm_gem_object **obj, unsigned int num_planes) 31 { 32 struct drm_framebuffer *fb; 33 int ret; 34 int i; 35 36 fb = kzalloc(sizeof(*fb), GFP_KERNEL); 37 if (!fb) 38 return ERR_PTR(-ENOMEM); 39 40 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 41 42 for (i = 0; i < num_planes; i++) 43 fb->obj[i] = obj[i]; 44 45 ret = drm_framebuffer_init(dev, fb, &rockchip_drm_fb_funcs); 46 if (ret) { 47 DRM_DEV_ERROR(dev->dev, 48 "Failed to initialize framebuffer: %d\n", 49 ret); 50 kfree(fb); 51 return ERR_PTR(ret); 52 } 53 54 return fb; 55 } 56 57 static struct drm_framebuffer * 58 rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, 59 const struct drm_mode_fb_cmd2 *mode_cmd) 60 { 61 const struct drm_format_info *info = drm_get_format_info(dev, 62 mode_cmd); 63 struct drm_framebuffer *fb; 64 struct drm_gem_object *objs[ROCKCHIP_MAX_FB_BUFFER]; 65 struct drm_gem_object *obj; 66 int num_planes = min_t(int, info->num_planes, ROCKCHIP_MAX_FB_BUFFER); 67 int ret; 68 int i; 69 70 for (i = 0; i < num_planes; i++) { 71 unsigned int width = mode_cmd->width / (i ? info->hsub : 1); 72 unsigned int height = mode_cmd->height / (i ? info->vsub : 1); 73 unsigned int min_size; 74 75 obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[i]); 76 if (!obj) { 77 DRM_DEV_ERROR(dev->dev, 78 "Failed to lookup GEM object\n"); 79 ret = -ENXIO; 80 goto err_gem_object_unreference; 81 } 82 83 min_size = (height - 1) * mode_cmd->pitches[i] + 84 mode_cmd->offsets[i] + 85 width * info->cpp[i]; 86 87 if (obj->size < min_size) { 88 drm_gem_object_put_unlocked(obj); 89 ret = -EINVAL; 90 goto err_gem_object_unreference; 91 } 92 objs[i] = obj; 93 } 94 95 fb = rockchip_fb_alloc(dev, mode_cmd, objs, i); 96 if (IS_ERR(fb)) { 97 ret = PTR_ERR(fb); 98 goto err_gem_object_unreference; 99 } 100 101 return fb; 102 103 err_gem_object_unreference: 104 for (i--; i >= 0; i--) 105 drm_gem_object_put_unlocked(objs[i]); 106 return ERR_PTR(ret); 107 } 108 109 static void 110 rockchip_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) 111 { 112 struct drm_device *dev = old_state->dev; 113 114 rockchip_drm_psr_inhibit_get_state(old_state); 115 116 drm_atomic_helper_commit_modeset_disables(dev, old_state); 117 118 drm_atomic_helper_commit_modeset_enables(dev, old_state); 119 120 drm_atomic_helper_commit_planes(dev, old_state, 121 DRM_PLANE_COMMIT_ACTIVE_ONLY); 122 123 rockchip_drm_psr_inhibit_put_state(old_state); 124 125 drm_atomic_helper_commit_hw_done(old_state); 126 127 drm_atomic_helper_wait_for_vblanks(dev, old_state); 128 129 drm_atomic_helper_cleanup_planes(dev, old_state); 130 } 131 132 static const struct drm_mode_config_helper_funcs rockchip_mode_config_helpers = { 133 .atomic_commit_tail = rockchip_atomic_helper_commit_tail_rpm, 134 }; 135 136 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = { 137 .fb_create = rockchip_user_fb_create, 138 .output_poll_changed = drm_fb_helper_output_poll_changed, 139 .atomic_check = drm_atomic_helper_check, 140 .atomic_commit = drm_atomic_helper_commit, 141 }; 142 143 struct drm_framebuffer * 144 rockchip_drm_framebuffer_init(struct drm_device *dev, 145 const struct drm_mode_fb_cmd2 *mode_cmd, 146 struct drm_gem_object *obj) 147 { 148 struct drm_framebuffer *fb; 149 150 fb = rockchip_fb_alloc(dev, mode_cmd, &obj, 1); 151 if (IS_ERR(fb)) 152 return ERR_CAST(fb); 153 154 return fb; 155 } 156 157 void rockchip_drm_mode_config_init(struct drm_device *dev) 158 { 159 dev->mode_config.min_width = 0; 160 dev->mode_config.min_height = 0; 161 162 /* 163 * set max width and height as default value(4096x4096). 164 * this value would be used to check framebuffer size limitation 165 * at drm_mode_addfb(). 166 */ 167 dev->mode_config.max_width = 4096; 168 dev->mode_config.max_height = 4096; 169 170 dev->mode_config.funcs = &rockchip_drm_mode_config_funcs; 171 dev->mode_config.helper_private = &rockchip_mode_config_helpers; 172 } 173